Tzuyu was born on Monday, June 14, 1999. She’s younger than Twice’s oldest member, Nayeon, by 3 years, 8 months, and 23 days.

Like fellow member Chaeyoung, she was born in the Chinese Year of the Hare. She and Dahyun are both Geminis. Tzuyu, Nayeon, Momo, and Mina’s blood type is A. At a height of 170 cm or 5'7", she’s Twice’s tallest member. She’s taller than the shortest member, Jihyo, by 8 cm.